HONEYWELL DCS卡件 DKI4247C /MF-75K-380 51304650-100 / MU-TD0D13 DCS 51401491-100 hmi siemens
HONEYWELL DCS卡件 DKI4247C /MF-75K-380 51304650-100 / MU-TD0D13 DCS 51401491-100 hmi siemens
HONEYWELL DCS卡件 DKI4247C /MF-75K-380 51304650-100 / MU-TD0D13 DCS 51401491-100 hmi siemens
傳感器輸出有很多形式，但是大多是電流輸出和電壓輸出，有些客戶在選擇傳感器的時候不知道應該選擇電路輸出還是電壓輸出，下面我們就來說說這兩種輸出的區別，下面我們以壓力傳感器為例進行說明。
壓力傳感器是應用zui多的一款傳感器之一，電流輸出和電壓輸出的壓力傳感器都非常常見，這兩種輸出主要有下面幾個區別，首先，早期的變送器大多為電壓輸出型，即將測量信號轉換為0-5V電壓輸出，這是運放直接輸出,信號功率<0.05W,通過模擬/數字轉換電路轉換數字信號供單片機讀取、控制。其次，在信號需要遠距離傳輸或使用環境中電網干擾較大的場合，電壓輸出型傳感器的使用受到了*限制，暴露了抗*力較差,線路損耗破壞了精度等等等缺點，而兩線制電流輸出型變送器以其具有*的抗*力得到了廣泛應用。zui后，電壓輸出型變送器抗*力極差，線路損耗的破壞,談不上精度有多高,有時輸出的直流電壓上還疊加有交流成分，使單片機產生誤判斷，控制出現錯誤，嚴重時還會損壞設備，輸出0-5V不能遠傳，遠傳后線路壓降大，精確度大打折扣。
電流輸出、電壓輸出的傳感器都是非常常見的，但是就目前發展趨勢來看，電壓輸出正在逐漸淘汰，現在數字輸出的傳感器也正在被客戶接收，數字輸出的傳感器信號容易處理，便于集成，未來更多的傳感器將會選擇數字輸出的。
APPLIED MATERIALS 0010-77258 MEMBRANE VACUUM
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